Stoker mechanism



Spt. 24, 1935..

E. A. TURNER STOKER MECHANISM Original Filed June 12. 1926 2 Sheets-Shea;

' INVENTOR.

E. A. TURNER Sept; 24, 1935.

STOKER MECHANI SM Original Filed June 12, 1926 2 Sheets-Sheet 1 I N VEN TOR.

Patented Sept. 24, 1935 UNITED STATES PATENT OFFICE" STOKER MECHANISM Edwin Archer Turner, New York, N. Y., assignor to The Standard Stoker Company, Incorporated, a corporation of Delaware Original application June 12, 1926, Serial No. 115,623. Divided and this application May 2,

1930, Serial No. 449,098

2 Claims. (01. 110-101 and more particularly to fuel distributors and the like.

The principal object of the invention is the provision of a novel distributor tube having a curved tubular extension formed therewith.

Another object of the invention is the provision of a novel distributor member that is cheap to manufacture, easily assembled on the stoker, eflicient in operation, strong and durable and that reduces the number of parts thereby eliminating joints that can work loose and cause trouble.

Other and further objects and advantages will readily appear to those skilled in the art from the following drawings, in which Fig. 1 is a rear view of a locomotive, showing the invention in position thereon; Fig. 2 is a vertical section of the rear portion of a locomotive, showing one form of the invention in position thereon, with parts in section and parts broken away; and

Fig. 3 is a section on line 33 of Fig. 2.

On the drawings, the reference character 10 designates the backhead of a conventional locomotive, the firebox thereof, and I2 the firedoor opening. The stoker is designated generally by the reference character 13 and comprises the conveyer 9 for transferring the fuel from a source of supply, as the tender, to the locomotive, a pair of divergent fuel conduits or elevators I 4 and an adjustable divider 8 for dividing the stream of fuel from the conveyer in proper proportions for the two elevators.

The conveyer and elevators are preferably of the screw type and are adapted to be operated through suitable gearing from a mot-or 15 in the usual manner. Since the details of the driving mechanism and the screw conveyer constitute no part of the present invention, it is not thought necessary to further describe or illustrate the same In the form of the device shown in Figs. 1 and 2 the upper or terminal portion of each elevator conduit is in the form of an elbow or curved tubular portion I6, the front end of which constitutes a distributor member 20 extending through an opening I! in the backhead ID for distributing fuel over the grates of the firebox. Each elbow is provided with an opening 25 through which access may be had to the interior of the elbow. A closure 26 is provided for the opening 25. It is preferably though not necessarily hinged at its upper end as at 21 and a latch 28 holds the same in closed position.

It is desirable that means be provided fordetachably connecting the distributor members '5 to the elevator casings whereby the distributor member may be removed for replacement or repairs. As shown, the elbows I6 are detachably connected to the upper ends of the elevator casings by means of bolts or other fastening elel0 ments extending through the abutting flanges The elevators 14 comprise elevator screws 21, which for convenience in removing the elbows l6, terminate adjacent to the upper ends of the 15- elevator casings. The elbow is provided with a curved, bore the curved portion of which is preferably dome-shaped,v whereby fuel forced upwardly by the screw elevator will be directed onto the distributor in front of the steam nozzle 22,- 20 The nozzle 22 is preferably provided with a plurality of steam jets which are supplied by steam from the pipes 30 for projecting the fuel into the firebox.

The front end of the distributor member is provided with a baflie 23 and forwardly and laterally extending channels 24 as is well understood in the art.

The front end of the distributor member 20 extends into the firebox and consequently is subjected to the intense heat of the burning fuel during the operation of the locomotive. In order to prevent the distributor member from becoming damaged or incapacitated by the heat of combustion, suitable means are provided for cooling the distributor member.

In the form of the device selected to illustrate one manner of accomplishing this function, the distributor member is cooled by circulating a fluid therethrough. The distributor member is cored as at 3| to form a water jacket through which water is adapted to be circulated. Preferably the water is forced through the jacket by the water pump, entering the jacket through the pipe 29 at the rear lower portion of the distributor 45 member and passing from the same through the pipe 32 into the boiler of the locomotive above the fire door opening.

The pipe 29 is connected to the backhead l0 through a short length of pipe 33 having the valve 34 therein. The pipe 32 is provided with a check valve 36 for preventing the return of the waterand steam from the boiler. If desired the pipe 29 may be provided with a valve 35 whereby the pipe 29 may be closed below the branch pipe 33 and by opening the valve 34 water from the boiler will circulate through the water jacket of the distributor tube.

The water jacket at the rear portion of the distributor member may be provided with a horizontal partition 3'! which will cause the water entering below the partition to flow to the front of the water jacket in passing through the distributor tube.

In the operation of the device, water is forced by the pump through the pipe 29 or flows by gravity through the pipe 33 into the pipe 29 and thence it passes into the rear lower portion of the water jacket of the distributor tube, thence forwardly and upwardly, and then rearwardly and out through the pipe 32 and into the boiler through the backhead of the locomotive.

I claim:

1. In combination, a firebox having a wall with an opening therein, a stoker fuel conduit, including a casing mounted more nearly vertical than horizontal externally of the firebox and being approximately straight along its medial longitudinal center line, a terminal portion comprising an elbow, said elbow forming a continuation of said casing and having its upper wall longitudinally curved towards the opening in said firebox wall, said terminal portion also comprising a fuel distributing member in the opening in said firebox wall having a fuel receiving surface extending forwardly from the lower forward edge of said elbow, means at the rear of said fuel distributing member adjacent the lower forward edge of said .elbow for projecting fuel across said fuel receiving surface into the firebox, a conveyer screw mounted in: said fuel conduit and terminating therein at its upper end below the lower edge of the curving upper wall of said elbow and below the lower forward edge of said elbow a distance sufficient to permit a core of fuel to form in and fill a portion of said conduit above said screw, said curving upper wall having a radius of curvature not less than halfthe diameter of said casing whereby the core of fuel advanced by said screw will be directed forwardly through said elbow onto the fuel receiving surface of said distributing member immediately in front of said fuel projecting means.

2. In combination, a firebox having a wall with an opening therein, a stoker fuel conduit including a casing mounted more nearly vertical than horizontal externally of the firebox and being approximately straight along its medial longitudinal center line, a, terminal portion comprising an elbow, said elbow forming a continuation of said casing and having its upper wall longitudinally curved towards the opening in said firebox wall, said terminal portion also comprising a fuel distributing member in the opening in said firebox wall having a fuel receiving surface extending forwardly from the lower forward edge of said elbow, means at the rear of said fuel distributing member adjacent the lower forward edge of said elbow for projecting fuel across said fuel receiving surface into the firebox, a conveyer screw mounted in said fuel conduit and terminating therein at its upper end below the lower edge of the curving upper wall of said elbow and below the lower forward edge of said elbow a distance sufficient to permit a core of fuel to form in and fill a portion of said conduit above said screw, said curving upper wall having a radius of curvature not less than half the diameter of said casing and extending forward of the fuel projecting means whereby the core of fuel advanced by said screw will be directed forwardly through said elbow onto the'fuel receiving surface of said distributing member immediately in front of said fuel projecting means.

E. ARCHER TURNER. 

